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a12a4b963e
Summary: LiveRangeShrink pass moves instruction right after the definition with the same BB if the instruction and its operands all have more than one use. This pass is inexpensive and guarantees optimal live-range within BB. Reviewers: davidxl, wmi, hfinkel, MatzeB, andreadb Reviewed By: MatzeB, andreadb Subscribers: hiraditya, jyknight, sanjoy, skatkov, gberry, jholewinski, qcolombet, javed.absar, krytarowski, atrick, spatel, RKSimon, andreadb, MatzeB, mehdi_amini, mgorny, efriedma, davide, dberlin, llvm-commits Differential Revision: https://reviews.llvm.org/D32563 llvm-svn: 304371
396 lines
13 KiB
LLVM
396 lines
13 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -O2 -mtriple=x86_64-linux-android -mattr=+mmx -enable-legalize-types-checking | FileCheck %s
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; RUN: llc < %s -O2 -mtriple=x86_64-linux-gnu -mattr=+mmx -enable-legalize-types-checking | FileCheck %s
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; These tests were generated from simplified libm C code.
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; When compiled for the x86_64-linux-android target,
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; long double is mapped to f128 type that should be passed
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; in SSE registers. When the f128 type calling convention
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; problem was fixed, old llvm code failed to handle f128 values
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; in several f128/i128 type operations. These unit tests hopefully
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; will catch regression in any future change in this area.
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; To modified or enhance these test cases, please consult libm
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; code pattern and compile with -target x86_64-linux-android
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; to generate IL. The __float128 keyword if not accepted by
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; clang, just define it to "long double".
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;
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; typedef long double __float128;
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; union IEEEl2bits {
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; __float128 e;
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; struct {
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; unsigned long manl :64;
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; unsigned long manh :48;
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; unsigned int exp :15;
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; unsigned int sign :1;
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; } bits;
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; struct {
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; unsigned long manl :64;
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; unsigned long manh :48;
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; unsigned int expsign :16;
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; } xbits;
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; };
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; C code:
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; void foo(__float128 x);
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; void TestUnionLD1(__float128 s, unsigned long n) {
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; union IEEEl2bits u;
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; __float128 w;
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; u.e = s;
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; u.bits.manh = n;
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; w = u.e;
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; foo(w);
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; }
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define void @TestUnionLD1(fp128 %s, i64 %n) #0 {
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; CHECK-LABEL: TestUnionLD1:
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; CHECK: # BB#0: # %entry
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; CHECK-NEXT: movaps %xmm0, -{{[0-9]+}}(%rsp)
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; CHECK-NEXT: movq -{{[0-9]+}}(%rsp), %rax
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; CHECK-NEXT: movabsq $281474976710655, %rcx # imm = 0xFFFFFFFFFFFF
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; CHECK-NEXT: andq %rdi, %rcx
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; CHECK-NEXT: movabsq $-281474976710656, %rdx # imm = 0xFFFF000000000000
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; CHECK-NEXT: andq -{{[0-9]+}}(%rsp), %rdx
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; CHECK-NEXT: orq %rcx, %rdx
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; CHECK-NEXT: movq %rax, -{{[0-9]+}}(%rsp)
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; CHECK-NEXT: movq %rdx, -{{[0-9]+}}(%rsp)
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; CHECK-NEXT: movaps -{{[0-9]+}}(%rsp), %xmm0
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; CHECK-NEXT: jmp foo # TAILCALL
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entry:
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%0 = bitcast fp128 %s to i128
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%1 = zext i64 %n to i128
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%bf.value = shl nuw i128 %1, 64
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%bf.shl = and i128 %bf.value, 5192296858534809181786422619668480
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%bf.clear = and i128 %0, -5192296858534809181786422619668481
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%bf.set = or i128 %bf.shl, %bf.clear
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%2 = bitcast i128 %bf.set to fp128
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tail call void @foo(fp128 %2) #2
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ret void
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}
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; C code:
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; __float128 TestUnionLD2(__float128 s) {
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; union IEEEl2bits u;
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; __float128 w;
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; u.e = s;
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; u.bits.manl = 0;
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; w = u.e;
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; return w;
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; }
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define fp128 @TestUnionLD2(fp128 %s) #0 {
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; CHECK-LABEL: TestUnionLD2:
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; CHECK: # BB#0: # %entry
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; CHECK-NEXT: movaps %xmm0, -{{[0-9]+}}(%rsp)
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; CHECK-NEXT: movq -{{[0-9]+}}(%rsp), %rax
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; CHECK-NEXT: movq %rax, -{{[0-9]+}}(%rsp)
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; CHECK-NEXT: movq $0, -{{[0-9]+}}(%rsp)
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; CHECK-NEXT: movaps -{{[0-9]+}}(%rsp), %xmm0
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; CHECK-NEXT: retq
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entry:
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%0 = bitcast fp128 %s to i128
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%bf.clear = and i128 %0, -18446744073709551616
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%1 = bitcast i128 %bf.clear to fp128
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ret fp128 %1
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}
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; C code:
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; __float128 TestI128_1(__float128 x)
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; {
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; union IEEEl2bits z;
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; z.e = x;
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; z.bits.sign = 0;
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; return (z.e < 0.1L) ? 1.0L : 2.0L;
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; }
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define fp128 @TestI128_1(fp128 %x) #0 {
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; CHECK-LABEL: TestI128_1:
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; CHECK: # BB#0: # %entry
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; CHECK-NEXT: subq $40, %rsp
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; CHECK-NEXT: movaps %xmm0, {{[0-9]+}}(%rsp)
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; CHECK-NEXT: movq {{[0-9]+}}(%rsp), %rax
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; CHECK-NEXT: movabsq $9223372036854775807, %rcx # imm = 0x7FFFFFFFFFFFFFFF
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; CHECK-NEXT: andq {{[0-9]+}}(%rsp), %rcx
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; CHECK-NEXT: movq %rcx, {{[0-9]+}}(%rsp)
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; CHECK-NEXT: movq %rax, (%rsp)
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; CHECK-NEXT: movaps (%rsp), %xmm0
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; CHECK-NEXT: movaps {{.*}}(%rip), %xmm1
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; CHECK-NEXT: callq __lttf2
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; CHECK-NEXT: xorl %ecx, %ecx
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; CHECK-NEXT: testl %eax, %eax
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; CHECK-NEXT: sets %cl
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; CHECK-NEXT: shlq $4, %rcx
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; CHECK-NEXT: movaps {{\.LCPI.*}}(%rcx), %xmm0
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; CHECK-NEXT: addq $40, %rsp
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; CHECK-NEXT: retq
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entry:
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%0 = bitcast fp128 %x to i128
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%bf.clear = and i128 %0, 170141183460469231731687303715884105727
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%1 = bitcast i128 %bf.clear to fp128
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%cmp = fcmp olt fp128 %1, 0xL999999999999999A3FFB999999999999
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%cond = select i1 %cmp, fp128 0xL00000000000000003FFF000000000000, fp128 0xL00000000000000004000000000000000
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ret fp128 %cond
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}
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; C code:
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; __float128 TestI128_2(__float128 x, __float128 y)
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; {
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; unsigned short hx;
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; union IEEEl2bits ge_u;
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; ge_u.e = x;
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; hx = ge_u.xbits.expsign;
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; return (hx & 0x8000) == 0 ? x : y;
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; }
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define fp128 @TestI128_2(fp128 %x, fp128 %y) #0 {
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; CHECK-LABEL: TestI128_2:
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; CHECK: # BB#0: # %entry
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; CHECK-NEXT: movaps %xmm0, -{{[0-9]+}}(%rsp)
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; CHECK-NEXT: cmpq $0, -{{[0-9]+}}(%rsp)
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; CHECK-NEXT: jns .LBB3_2
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; CHECK-NEXT: # BB#1: # %entry
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; CHECK-NEXT: movaps %xmm1, %xmm0
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; CHECK-NEXT: .LBB3_2: # %entry
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; CHECK-NEXT: retq
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entry:
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%0 = bitcast fp128 %x to i128
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%cmp = icmp sgt i128 %0, -1
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%cond = select i1 %cmp, fp128 %x, fp128 %y
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ret fp128 %cond
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}
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; C code:
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; __float128 TestI128_3(__float128 x, int *ex)
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; {
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; union IEEEl2bits u;
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; u.e = x;
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; if (u.bits.exp == 0) {
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; u.e *= 0x1.0p514;
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; u.bits.exp = 0x3ffe;
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; }
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; return (u.e);
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; }
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define fp128 @TestI128_3(fp128 %x, i32* nocapture readnone %ex) #0 {
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; CHECK-LABEL: TestI128_3:
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; CHECK: # BB#0: # %entry
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; CHECK-NEXT: subq $56, %rsp
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; CHECK-NEXT: movaps %xmm0, {{[0-9]+}}(%rsp)
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; CHECK-NEXT: movq {{[0-9]+}}(%rsp), %rax
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; CHECK-NEXT: movabsq $9223090561878065152, %rcx # imm = 0x7FFF000000000000
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; CHECK-NEXT: testq %rcx, %rax
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; CHECK-NEXT: je .LBB4_2
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; CHECK-NEXT: # BB#1:
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; CHECK-NEXT: movq {{[0-9]+}}(%rsp), %rcx
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; CHECK-NEXT: jmp .LBB4_3
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; CHECK-NEXT: .LBB4_2: # %if.then
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; CHECK-NEXT: movaps {{.*}}(%rip), %xmm1
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; CHECK-NEXT: callq __multf3
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; CHECK-NEXT: movaps %xmm0, {{[0-9]+}}(%rsp)
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; CHECK-NEXT: movq {{[0-9]+}}(%rsp), %rcx
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; CHECK-NEXT: movabsq $-9223090561878065153, %rdx # imm = 0x8000FFFFFFFFFFFF
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; CHECK-NEXT: andq {{[0-9]+}}(%rsp), %rdx
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; CHECK-NEXT: movabsq $4611123068473966592, %rax # imm = 0x3FFE000000000000
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; CHECK-NEXT: orq %rdx, %rax
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; CHECK-NEXT: .LBB4_3: # %if.end
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; CHECK-NEXT: movq %rcx, (%rsp)
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; CHECK-NEXT: movq %rax, {{[0-9]+}}(%rsp)
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; CHECK-NEXT: movaps (%rsp), %xmm0
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; CHECK-NEXT: addq $56, %rsp
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; CHECK-NEXT: retq
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entry:
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%0 = bitcast fp128 %x to i128
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%bf.cast = and i128 %0, 170135991163610696904058773219554885632
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%cmp = icmp eq i128 %bf.cast, 0
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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%mul = fmul fp128 %x, 0xL00000000000000004201000000000000
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%1 = bitcast fp128 %mul to i128
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%bf.clear4 = and i128 %1, -170135991163610696904058773219554885633
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%bf.set = or i128 %bf.clear4, 85060207136517546210586590865283612672
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br label %if.end
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if.end: ; preds = %if.then, %entry
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%u.sroa.0.0 = phi i128 [ %bf.set, %if.then ], [ %0, %entry ]
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%2 = bitcast i128 %u.sroa.0.0 to fp128
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ret fp128 %2
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}
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; C code:
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; __float128 TestI128_4(__float128 x)
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; {
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; union IEEEl2bits u;
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; __float128 df;
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; u.e = x;
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; u.xbits.manl = 0;
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; df = u.e;
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; return x + df;
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; }
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define fp128 @TestI128_4(fp128 %x) #0 {
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; CHECK-LABEL: TestI128_4:
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; CHECK: # BB#0: # %entry
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; CHECK-NEXT: subq $40, %rsp
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; CHECK-NEXT: movaps %xmm0, %xmm1
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; CHECK-NEXT: movaps %xmm1, {{[0-9]+}}(%rsp)
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; CHECK-NEXT: movq {{[0-9]+}}(%rsp), %rax
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; CHECK-NEXT: movq %rax, {{[0-9]+}}(%rsp)
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; CHECK-NEXT: movq $0, (%rsp)
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; CHECK-NEXT: movaps (%rsp), %xmm0
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; CHECK-NEXT: callq __addtf3
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; CHECK-NEXT: addq $40, %rsp
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; CHECK-NEXT: retq
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entry:
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%0 = bitcast fp128 %x to i128
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%bf.clear = and i128 %0, -18446744073709551616
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%1 = bitcast i128 %bf.clear to fp128
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%add = fadd fp128 %1, %x
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ret fp128 %add
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}
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@v128 = common global i128 0, align 16
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@v128_2 = common global i128 0, align 16
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; C code:
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; unsigned __int128 v128, v128_2;
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; void TestShift128_2() {
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; v128 = ((v128 << 96) | v128_2);
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; }
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define void @TestShift128_2() #2 {
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; CHECK-LABEL: TestShift128_2:
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; CHECK: # BB#0: # %entry
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; CHECK-NEXT: movq {{.*}}(%rip), %rax
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; CHECK-NEXT: shlq $32, %rax
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; CHECK-NEXT: movq {{.*}}(%rip), %rcx
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; CHECK-NEXT: orq v128_2+{{.*}}(%rip), %rax
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; CHECK-NEXT: movq %rcx, {{.*}}(%rip)
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; CHECK-NEXT: movq %rax, v128+{{.*}}(%rip)
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; CHECK-NEXT: retq
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entry:
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%0 = load i128, i128* @v128, align 16
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%shl = shl i128 %0, 96
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%1 = load i128, i128* @v128_2, align 16
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%or = or i128 %shl, %1
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store i128 %or, i128* @v128, align 16
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ret void
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}
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define fp128 @acosl(fp128 %x) #0 {
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; CHECK-LABEL: acosl:
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; CHECK: # BB#0: # %entry
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; CHECK-NEXT: subq $40, %rsp
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; CHECK-NEXT: movaps %xmm0, %xmm1
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; CHECK-NEXT: movaps %xmm1, {{[0-9]+}}(%rsp)
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; CHECK-NEXT: movq {{[0-9]+}}(%rsp), %rax
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; CHECK-NEXT: movq %rax, {{[0-9]+}}(%rsp)
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; CHECK-NEXT: movq $0, (%rsp)
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; CHECK-NEXT: movaps (%rsp), %xmm0
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; CHECK-NEXT: callq __addtf3
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; CHECK-NEXT: addq $40, %rsp
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; CHECK-NEXT: retq
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entry:
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%0 = bitcast fp128 %x to i128
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%bf.clear = and i128 %0, -18446744073709551616
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%1 = bitcast i128 %bf.clear to fp128
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%add = fadd fp128 %1, %x
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ret fp128 %add
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}
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; Compare i128 values and check i128 constants.
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define fp128 @TestComp(fp128 %x, fp128 %y) #0 {
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; CHECK-LABEL: TestComp:
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; CHECK: # BB#0: # %entry
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; CHECK-NEXT: movaps %xmm0, -{{[0-9]+}}(%rsp)
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; CHECK-NEXT: cmpq $0, -{{[0-9]+}}(%rsp)
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; CHECK-NEXT: jns .LBB8_2
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; CHECK-NEXT: # BB#1: # %entry
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; CHECK-NEXT: movaps %xmm1, %xmm0
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; CHECK-NEXT: .LBB8_2: # %entry
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; CHECK-NEXT: retq
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entry:
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%0 = bitcast fp128 %x to i128
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%cmp = icmp sgt i128 %0, -1
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%cond = select i1 %cmp, fp128 %x, fp128 %y
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ret fp128 %cond
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}
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declare void @foo(fp128) #1
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; Test logical operations on fp128 values.
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define fp128 @TestFABS_LD(fp128 %x) #0 {
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; CHECK-LABEL: TestFABS_LD:
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; CHECK: # BB#0: # %entry
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; CHECK-NEXT: andps {{.*}}(%rip), %xmm0
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; CHECK-NEXT: retq
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entry:
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%call = tail call fp128 @fabsl(fp128 %x) #2
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ret fp128 %call
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}
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declare fp128 @fabsl(fp128) #1
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declare fp128 @copysignl(fp128, fp128) #1
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; Test more complicated logical operations generated from copysignl.
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define void @TestCopySign({ fp128, fp128 }* noalias nocapture sret %agg.result, { fp128, fp128 }* byval nocapture readonly align 16 %z) #0 {
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; CHECK-LABEL: TestCopySign:
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; CHECK: # BB#0: # %entry
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; CHECK-NEXT: pushq %rbp
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; CHECK-NEXT: pushq %rbx
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; CHECK-NEXT: subq $40, %rsp
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; CHECK-NEXT: movq %rdi, %rbx
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; CHECK-NEXT: movaps {{[0-9]+}}(%rsp), %xmm0
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; CHECK-NEXT: movaps {{[0-9]+}}(%rsp), %xmm1
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; CHECK-NEXT: movaps %xmm1, {{[0-9]+}}(%rsp) # 16-byte Spill
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; CHECK-NEXT: movaps %xmm0, (%rsp) # 16-byte Spill
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; CHECK-NEXT: callq __gttf2
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; CHECK-NEXT: movl %eax, %ebp
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; CHECK-NEXT: movaps {{[0-9]+}}(%rsp), %xmm0 # 16-byte Reload
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; CHECK-NEXT: movaps %xmm0, %xmm1
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; CHECK-NEXT: callq __subtf3
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; CHECK-NEXT: testl %ebp, %ebp
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; CHECK-NEXT: jle .LBB10_1
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; CHECK-NEXT: # BB#2: # %if.then
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; CHECK-NEXT: andps {{.*}}(%rip), %xmm0
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; CHECK-NEXT: movaps %xmm0, %xmm1
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; CHECK-NEXT: movaps (%rsp), %xmm0 # 16-byte Reload
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; CHECK-NEXT: movaps %xmm1, %xmm2
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; CHECK-NEXT: jmp .LBB10_3
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; CHECK-NEXT: .LBB10_1:
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; CHECK-NEXT: movaps (%rsp), %xmm2 # 16-byte Reload
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; CHECK-NEXT: .LBB10_3: # %cleanup
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; CHECK-NEXT: movaps {{.*}}(%rip), %xmm1
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; CHECK-NEXT: andps {{[0-9]+}}(%rsp), %xmm1 # 16-byte Folded Reload
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; CHECK-NEXT: andps {{.*}}(%rip), %xmm0
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; CHECK-NEXT: orps %xmm1, %xmm0
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; CHECK-NEXT: movaps %xmm2, (%rbx)
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; CHECK-NEXT: movaps %xmm0, 16(%rbx)
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; CHECK-NEXT: movq %rbx, %rax
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; CHECK-NEXT: addq $40, %rsp
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; CHECK-NEXT: popq %rbx
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; CHECK-NEXT: popq %rbp
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; CHECK-NEXT: retq
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entry:
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%z.realp = getelementptr inbounds { fp128, fp128 }, { fp128, fp128 }* %z, i64 0, i32 0
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%z.real = load fp128, fp128* %z.realp, align 16
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%z.imagp = getelementptr inbounds { fp128, fp128 }, { fp128, fp128 }* %z, i64 0, i32 1
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%z.imag4 = load fp128, fp128* %z.imagp, align 16
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%cmp = fcmp ogt fp128 %z.real, %z.imag4
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%sub = fsub fp128 %z.imag4, %z.imag4
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br i1 %cmp, label %if.then, label %cleanup
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if.then: ; preds = %entry
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%call = tail call fp128 @fabsl(fp128 %sub) #2
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br label %cleanup
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cleanup: ; preds = %entry, %if.then
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%z.real.sink = phi fp128 [ %z.real, %if.then ], [ %sub, %entry ]
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%call.sink = phi fp128 [ %call, %if.then ], [ %z.real, %entry ]
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%call5 = tail call fp128 @copysignl(fp128 %z.real.sink, fp128 %z.imag4) #2
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%0 = getelementptr inbounds { fp128, fp128 }, { fp128, fp128 }* %agg.result, i64 0, i32 0
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%1 = getelementptr inbounds { fp128, fp128 }, { fp128, fp128 }* %agg.result, i64 0, i32 1
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store fp128 %call.sink, fp128* %0, align 16
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store fp128 %call5, fp128* %1, align 16
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ret void
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}
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attributes #0 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+ssse3,+sse3,+popcnt,+sse,+sse2,+sse4.1,+sse4.2" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+ssse3,+sse3,+popcnt,+sse,+sse2,+sse4.1,+sse4.2" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind readnone }
|