27 lines
1.2 KiB
LLVM
27 lines
1.2 KiB
LLVM
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; REQUIRES: asserts
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; RUN: llc < %s -mtriple=i686-unknown-linux -relocation-model=static -stats 2>&1 | \
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; RUN: grep asm-printer | grep 14
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;
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; It's possible to schedule this in 14 instructions by avoiding
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; callee-save registers, but the scheduler isn't currently that
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; conervative with registers.
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@size20 = external dso_local global i32 ; <i32*> [#uses=1]
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@in5 = external dso_local global i8* ; <i8**> [#uses=1]
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define i32 @compare(i8* %a, i8* %b) nounwind {
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%tmp = bitcast i8* %a to i32* ; <i32*> [#uses=1]
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%tmp1 = bitcast i8* %b to i32* ; <i32*> [#uses=1]
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%tmp.upgrd.1 = load i32, i32* @size20 ; <i32> [#uses=1]
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%tmp.upgrd.2 = load i8*, i8** @in5 ; <i8*> [#uses=2]
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%tmp3 = load i32, i32* %tmp1 ; <i32> [#uses=1]
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%gep.upgrd.3 = zext i32 %tmp3 to i64 ; <i64> [#uses=1]
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%tmp4 = getelementptr i8, i8* %tmp.upgrd.2, i64 %gep.upgrd.3 ; <i8*> [#uses=2]
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%tmp7 = load i32, i32* %tmp ; <i32> [#uses=1]
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%gep.upgrd.4 = zext i32 %tmp7 to i64 ; <i64> [#uses=1]
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%tmp8 = getelementptr i8, i8* %tmp.upgrd.2, i64 %gep.upgrd.4 ; <i8*> [#uses=2]
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%tmp.upgrd.5 = tail call i32 @memcmp( i8* %tmp8, i8* %tmp4, i32 %tmp.upgrd.1 ) ; <i32> [#uses=1]
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ret i32 %tmp.upgrd.5
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}
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declare i32 @memcmp(i8*, i8*, i32)
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