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7cd663b80c
Generally, the ISEL is expanded into if-then-else sequence, in some cases (like when the destination register is the same with the true or false value register), it may just be expanded into just the if or else sequence. llvm-svn: 292154
175 lines
4.5 KiB
LLVM
175 lines
4.5 KiB
LLVM
; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=a2 -mattr=-crbits -disable-ppc-cmp-opt=0 | FileCheck %s
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; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=a2 -mattr=-crbits -disable-ppc-cmp-opt=0 -ppc-gen-isel=false | FileCheck --check-prefix=CHECK-NO-ISEL %s
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target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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define signext i32 @foo(i32 signext %a, i32 signext %b, i32* nocapture %c) #0 {
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entry:
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%sub = sub nsw i32 %a, %b
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store i32 %sub, i32* %c, align 4
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%cmp = icmp sgt i32 %a, %b
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%cond = select i1 %cmp, i32 %a, i32 %b
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ret i32 %cond
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; CHECK: @foo
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; CHECK-NOT: subf.
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}
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define signext i32 @foo2(i32 signext %a, i32 signext %b, i32* nocapture %c) #0 {
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entry:
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%shl = shl i32 %a, %b
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store i32 %shl, i32* %c, align 4
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%cmp = icmp sgt i32 %shl, 0
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%conv = zext i1 %cmp to i32
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ret i32 %conv
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; CHECK: @foo2
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; CHECK-NOT: slw.
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}
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define i64 @fool(i64 %a, i64 %b, i64* nocapture %c) #0 {
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entry:
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%sub = sub nsw i64 %a, %b
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store i64 %sub, i64* %c, align 8
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%cmp = icmp sgt i64 %a, %b
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%cond = select i1 %cmp, i64 %a, i64 %b
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ret i64 %cond
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; CHECK-LABEL: @fool
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; CHECK-NO-ISEL-LABEL: @fool
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; CHECK: subf. [[REG:[0-9]+]], 4, 3
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; CHECK: isel 3, 3, 4, 1
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; CHECK-NO-ISEL: bc 12, 1, [[TRUE:.LBB[0-9]+]]
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; CHECK-NO-ISEL: ori 3, 4, 0
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; CHECK-NO-ISEL: b [[SUCCESSOR:.LBB[0-9]+]]
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; CHECK: std [[REG]], 0(5)
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}
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define i64 @foolb(i64 %a, i64 %b, i64* nocapture %c) #0 {
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entry:
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%sub = sub nsw i64 %a, %b
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store i64 %sub, i64* %c, align 8
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%cmp = icmp sle i64 %a, %b
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%cond = select i1 %cmp, i64 %a, i64 %b
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ret i64 %cond
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; CHECK-LABEL: @foolb
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; CHECK-NO-ISEL-LABEL: @foolb
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; CHECK: subf. [[REG:[0-9]+]], 4, 3
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; CHECK: isel 3, 4, 3, 1
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; CHECK-NO-ISEL: bc 12, 1, [[TRUE:.LBB[0-9]+]]
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; CHECK-NO-ISEL-NEXT: b .LBB
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; CHECK-NO-ISEL addi: 3, 4, 0
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; CHECK: std [[REG]], 0(5)
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}
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define i64 @foolc(i64 %a, i64 %b, i64* nocapture %c) #0 {
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entry:
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%sub = sub nsw i64 %b, %a
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store i64 %sub, i64* %c, align 8
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%cmp = icmp sgt i64 %a, %b
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%cond = select i1 %cmp, i64 %a, i64 %b
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ret i64 %cond
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; CHECK-LABEL: @foolc
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; CHECK-NO-ISEL-LABEL: @foolc
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; CHECK: subf. [[REG:[0-9]+]], 3, 4
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; CHECK: isel 3, 3, 4, 0
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; CHECK-NO-ISEL: bc 12, 0, [[TRUE:.LBB[0-9]+]]
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; CHECK-NO-ISEL: ori 3, 4, 0
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; CHECK-NO-ISEL: b [[SUCCESSOR:.LBB[0-9]+]]
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; CHECK: std [[REG]], 0(5)
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}
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define i64 @foold(i64 %a, i64 %b, i64* nocapture %c) #0 {
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entry:
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%sub = sub nsw i64 %b, %a
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store i64 %sub, i64* %c, align 8
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%cmp = icmp slt i64 %a, %b
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%cond = select i1 %cmp, i64 %a, i64 %b
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ret i64 %cond
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; CHECK-LABEL: @foold
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; CHECK-NO-ISEL-LABEL: @foold
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; CHECK: subf. [[REG:[0-9]+]], 3, 4
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; CHECK: isel 3, 3, 4, 1
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; CHECK-NO-ISEL: bc 12, 1, [[TRUE:.LBB[0-9]+]]
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; CHECK-NO-ISEL: ori 3, 4, 0
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; CHECK-NO-ISEL: b [[SUCCESSOR:.LBB[0-9]+]]
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; CHECK: std [[REG]], 0(5)
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}
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define i64 @foold2(i64 %a, i64 %b, i64* nocapture %c) #0 {
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entry:
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%sub = sub nsw i64 %a, %b
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store i64 %sub, i64* %c, align 8
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%cmp = icmp slt i64 %a, %b
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%cond = select i1 %cmp, i64 %a, i64 %b
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ret i64 %cond
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; CHECK-LABEL: @foold2
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; CHECK-NO-ISEL-LABEL: @foold2
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; CHECK: subf. [[REG:[0-9]+]], 4, 3
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; CHECK: isel 3, 3, 4, 0
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; CHECK-NO-ISEL: bc 12, 0, [[TRUE:.LBB[0-9]+]]
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; CHECK-NO-ISEL: ori 3, 4, 0
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; CHECK-NO-ISEL: b [[SUCCESSOR:.LBB[0-9]+]]
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; CHECK: std [[REG]], 0(5)
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}
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define i64 @foo2l(i64 %a, i64 %b, i64* nocapture %c) #0 {
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entry:
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%shl = shl i64 %a, %b
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store i64 %shl, i64* %c, align 8
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%cmp = icmp sgt i64 %shl, 0
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%conv1 = zext i1 %cmp to i64
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ret i64 %conv1
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; CHECK: @foo2l
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; CHECK: sld. 4, 3, 4
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; CHECK: std 4, 0(5)
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}
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define double @food(double %a, double %b, double* nocapture %c) #0 {
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entry:
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%sub = fsub double %a, %b
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store double %sub, double* %c, align 8
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%cmp = fcmp ogt double %a, %b
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%cond = select i1 %cmp, double %a, double %b
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ret double %cond
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; CHECK: @food
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; CHECK-NOT: fsub. 0, 1, 2
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; CHECK: stfd 0, 0(5)
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}
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define float @foof(float %a, float %b, float* nocapture %c) #0 {
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entry:
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%sub = fsub float %a, %b
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store float %sub, float* %c, align 4
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%cmp = fcmp ogt float %a, %b
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%cond = select i1 %cmp, float %a, float %b
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ret float %cond
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; CHECK: @foof
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; CHECK-NOT: fsubs. 0, 1, 2
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; CHECK: stfs 0, 0(5)
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}
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declare i64 @llvm.ctpop.i64(i64);
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define signext i64 @fooct(i64 signext %a, i64 signext %b, i64* nocapture %c) #0 {
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entry:
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%sub = sub nsw i64 %a, %b
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%subc = call i64 @llvm.ctpop.i64(i64 %sub)
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store i64 %subc, i64* %c, align 4
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%cmp = icmp sgt i64 %subc, 0
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%cond = select i1 %cmp, i64 %a, i64 %b
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ret i64 %cond
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; CHECK: @fooct
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; CHECK-NOT: popcntd.
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}
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