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Improve test cases from r134746.

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Use memory barriers to force if-conversion off for these tests instead of
the internal llc command line option ifcvt-limit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134986 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2011-07-12 16:06:01 +00:00
parent c0f33cb590
commit 92bf81ddd0
2 changed files with 21 additions and 5 deletions
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11
test/CodeGen/Thumb2/thumb2-bcc.ll
View File

@ -1,7 +1,8 @@
; RUN: llc < %s -ifcvt-limit=0 -march=thumb -mattr=+thumb2 | FileCheck %s
; RUN: llc < %s -ifcvt-limit=0 -march=thumb -mattr=+thumb2 | not grep it
; RUN: llc < %s -march=thumb -mattr=+thumb2 | FileCheck %s
; RUN: llc < %s -march=thumb -mattr=+thumb2 | not grep it
; If-conversion defeats the purpose of this test, which is to check CBZ
; generation, so turn it off.
; generation, so use memory barrier instruction to make sure it doesn't
; happen and we get actual branches.
define i32 @t1(i32 %a, i32 %b, i32 %c) {
; CHECK: t1:
@ -10,12 +11,16 @@ define i32 @t1(i32 %a, i32 %b, i32 %c) {
br i1 %tmp2, label %cond_false, label %cond_true
cond_true:
call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 false)
%tmp5 = add i32 %b, 1
%tmp6 = and i32 %tmp5, %c
ret i32 %tmp6
cond_false:
call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 false)
%tmp7 = add i32 %b, -1
%tmp8 = xor i32 %tmp7, %c
ret i32 %tmp8
}
declare void @llvm.memory.barrier(i1, i1, i1, i1, i1) nounwind

15
test/CodeGen/Thumb2/thumb2-branch.ll
View File

@ -1,6 +1,7 @@
; RUN: llc < %s -ifcvt-limit=0 -mtriple=thumbv7-apple-darwin -mattr=+thumb2 | FileCheck %s
; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mattr=+thumb2 | FileCheck %s
; If-conversion defeats the purpose of this test, which is to check conditional
; branch generation, so turn it off.
; branch generation, so use memory barrier instruction to make sure it doesn't
; happen and we get actual branches.
define i32 @f1(i32 %a, i32 %b, i32* %v) {
entry:
@ -10,10 +11,12 @@ entry:
br i1 %tmp, label %cond_true, label %return
cond_true: ; preds = %entry
call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 false)
store i32 0, i32* %v
ret i32 0
return: ; preds = %entry
call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 false)
ret i32 1
}
@ -25,10 +28,12 @@ entry:
br i1 %tmp, label %cond_true, label %return
cond_true: ; preds = %entry
call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 false)
store i32 0, i32* %v
ret i32 0
return: ; preds = %entry
call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 false)
ret i32 1
}
@ -40,10 +45,12 @@ entry:
br i1 %tmp, label %cond_true, label %return
cond_true: ; preds = %entry
call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 false)
store i32 0, i32* %v
ret i32 0
return: ; preds = %entry
call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 false)
ret i32 1
}
@ -55,9 +62,13 @@ entry:
br i1 %tmp, label %return, label %cond_true
cond_true: ; preds = %entry
call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 false)
store i32 0, i32* %v
ret i32 0
return: ; preds = %entry
call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 false)
ret i32 1
}
declare void @llvm.memory.barrier(i1, i1, i1, i1, i1) nounwind