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a5ace10b01
This is marginally helpful for removing redundant extensions, and the code is easier to read, so it seems like an all-around win. In the new test i8-phi-ext.ll, we used to emit an AssertSext i8; now we emit an AssertZext i2, which allows the extension of the return value to be eliminated. Differential Revision: https://reviews.llvm.org/D49004 llvm-svn: 336868
22 lines
658 B
LLVM
22 lines
658 B
LLVM
; RUN: llc < %s | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "thumbv6m---eabi"
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; CHECK-LABEL: test_fn
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; CHECK-NOT: uxtb
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define dso_local zeroext i8 @test_fn(i32 %x, void (...)* nocapture %f) {
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entry:
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%tobool = icmp eq i32 %x, 0
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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%callee.knr.cast = bitcast void (...)* %f to void ()*
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tail call void %callee.knr.cast() #1
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br label %if.end
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if.end: ; preds = %entry, %if.then
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%z.0 = phi i8 [ 3, %if.then ], [ 0, %entry ]
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ret i8 %z.0
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}
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