26 lines
618 B
LLVM
26 lines
618 B
LLVM
; RUN: llc -mtriple=arm64-apple-ios -o - %s -fast-isel=1 -O0 | FileCheck %s
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; The zext can be folded into the load and removed, but doing so can invalidate
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; pointers internal to FastISel and cause a crash so it must be done carefully.
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define i32 @test() {
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; CHECK-LABEL: test:
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; CHECK: ldrh
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; CHECK: bl _callee
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; CHECK-NOT: uxth
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entry:
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store i32 undef, i32* undef, align 4
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%t81 = load i16, i16* undef, align 2
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call void @callee()
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%t82 = zext i16 %t81 to i32
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%t83 = shl i32 %t82, 16
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%t84 = or i32 undef, %t83
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br label %end
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end:
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%val = phi i32 [%t84, %entry]
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ret i32 %val
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}
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declare void @callee()
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