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llvm-mirror/test/CodeGen/PowerPC/ctrloops.ll
Ehsan Amiri 36d2ad6539 [PPC] Enable transformations in PPCPassConfig::addIRPasses at O2
http://reviews.llvm.org/D18562

A large number of testcases has been modified so they pass after this test.
One testcase is deleted, because I realized even after undoing the original
change that was committed with this testcase, the testcase still passes. So
I removed it. The change to one other testcase (test/CodeGen/PowerPC/pr25802.ll)
is an arbitrary change to keep it passing. Given the original intention of the
testcase, and the fact that fixing it will require some time to change the testcase,
we concluded that this quick change will be enough.

llvm-svn: 265683
2016-04-07 15:30:55 +00:00

98 lines
2.8 KiB
LLVM

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-v128:128:128-n32:64"
target triple = "powerpc64-unknown-freebsd10.0"
; RUN: llc < %s -march=ppc64 -relocation-model=pic | FileCheck %s
@a = common global i32 0, align 4
define void @test1(i32 %c) nounwind {
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%0 = load volatile i32, i32* @a, align 4
%add = add nsw i32 %0, %c
store volatile i32 %add, i32* @a, align 4
%inc = add nsw i32 %i.01, 1
%exitcond = icmp eq i32 %inc, 2048
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
ret void
; CHECK: @test1
; CHECK-NOT: or 3, 3, 3
; CHECK: mtctr
; CHECK-NOT: addi {[0-9]+}
; CHECK-NOT: cmplwi
; CHECK: bdnz
}
define void @test2(i32 %c, i32 %d) nounwind {
entry:
%cmp1 = icmp sgt i32 %d, 0
br i1 %cmp1, label %for.body, label %for.end
for.body: ; preds = %entry, %for.body
%i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
%0 = load volatile i32, i32* @a, align 4
%add = add nsw i32 %0, %c
store volatile i32 %add, i32* @a, align 4
%inc = add nsw i32 %i.02, 1
%exitcond = icmp eq i32 %inc, %d
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body, %entry
ret void
; CHECK: @test2
; CHECK: mtctr
; CHECK-NOT: addi {[0-9]+}
; CHECK-NOT: cmplwi
; CHECK: bdnz
}
define void @test3(i32 %c, i32 %d) nounwind {
entry:
%cmp1 = icmp sgt i32 %d, 0
br i1 %cmp1, label %for.body, label %for.end
for.body: ; preds = %entry, %for.body
%i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
%mul = mul nsw i32 %i.02, %c
%0 = load volatile i32, i32* @a, align 4
%add = add nsw i32 %0, %mul
store volatile i32 %add, i32* @a, align 4
%inc = add nsw i32 %i.02, 1
%exitcond = icmp eq i32 %inc, %d
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body, %entry
ret void
; CHECK: @test3
; CHECK: mtctr
; CHECK-NOT: addi {[0-9]+}
; CHECK-NOT: cmplwi
; CHECK: bdnz
}
@tls_var = external thread_local global i8
define i32 @test4(i32 %inp) {
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%phi = phi i32 [ %dec, %for.body ], [ %inp, %entry ]
%load = ptrtoint i8* @tls_var to i32
%val = add i32 %load, %phi
%dec = add i32 %phi, -1
%cmp = icmp sgt i32 %phi, 1
br i1 %cmp, label %for.body, label %return
return: ; preds = %for.body
ret i32 %val
; CHECK-LABEL: @test4
; CHECK: mtctr
; CHECK: bdnz
; CHECK: __tls_get_addr
}