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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121656 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-12-13 00:15:25 +00:00
parent 638f7a9a5e
commit a97c91f014
1 changed files with 36 additions and 0 deletions
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36
lib/Target/README.txt
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@ -1973,3 +1973,39 @@ _foo: ## @foo
//===---------------------------------------------------------------------===//
This code (from GCC PR28685):
int test(int a, int b) {
int lt = a < b;
int eq = a == b;
if (lt)
return 1;
return eq;
}
Is compiled to:
define i32 @test(i32 %a, i32 %b) nounwind readnone ssp {
entry:
%cmp = icmp slt i32 %a, %b
br i1 %cmp, label %return, label %if.end
if.end: ; preds = %entry
%cmp5 = icmp eq i32 %a, %b
%conv6 = zext i1 %cmp5 to i32
ret i32 %conv6
return: ; preds = %entry
ret i32 1
}
it could be:
define i32 @test__(i32 %a, i32 %b) nounwind readnone ssp {
entry:
%0 = icmp sle i32 %a, %b
%retval = zext i1 %0 to i32
ret i32 %retval
}
//===---------------------------------------------------------------------===//