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| -rw-r--r-- | lib/Target/README.txt | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index 35273344d7..836e74e6bc 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -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 +} + +//===---------------------------------------------------------------------===// |