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https://github.com/RPCS3/llvm-mirror.git
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0667f54980
In r260133, LLVM was changed to no longer extend i8/i16 return values, as it's not required by the ABI. However, code was found in the wild that relies on the old behaviour on Darwin, so this commit reverts back to that old behaviour for Darwin. On other platforms, it's less likely that code would be depending on the old behaviour, as GCC and MSVC haven't been extending such return values. llvm-svn: 261235
97 lines
2.8 KiB
LLVM
97 lines
2.8 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-darwin -asm-verbose=false | FileCheck %s -check-prefix=64BIT
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; rdar://7329206
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; In 32-bit the partial register stall would degrade performance.
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define zeroext i16 @t1(i16 zeroext %c, i16 zeroext %k) nounwind ssp {
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entry:
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; 32BIT-LABEL: t1:
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; 32BIT: movw 20(%esp), %ax
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; 32BIT-NOT: movw %ax, %cx
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; 32BIT: leal 1(%eax), %ecx
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; 64BIT-LABEL: t1:
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; 64BIT-NOT: movw %si, %ax
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; 64BIT: leal 1(%rsi), %eax
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%0 = icmp eq i16 %k, %c ; <i1> [#uses=1]
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%1 = add i16 %k, 1 ; <i16> [#uses=3]
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br i1 %0, label %bb, label %bb1
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bb: ; preds = %entry
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tail call void @foo(i16 zeroext %1) nounwind
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ret i16 %1
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bb1: ; preds = %entry
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ret i16 %1
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}
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define zeroext i16 @t2(i16 zeroext %c, i16 zeroext %k) nounwind ssp {
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entry:
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; 32BIT-LABEL: t2:
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; 32BIT: movw 20(%esp), %ax
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; 32BIT-NOT: movw %ax, %cx
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; 32BIT: leal -1(%eax), %ecx
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; 64BIT-LABEL: t2:
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; 64BIT-NOT: movw %si, %ax
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; 64BIT: leal -1(%rsi), %eax
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; 64BIT: movzwl %ax
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%0 = icmp eq i16 %k, %c ; <i1> [#uses=1]
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%1 = add i16 %k, -1 ; <i16> [#uses=3]
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br i1 %0, label %bb, label %bb1
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bb: ; preds = %entry
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tail call void @foo(i16 zeroext %1) nounwind
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ret i16 %1
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bb1: ; preds = %entry
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ret i16 %1
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}
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declare void @foo(i16 zeroext)
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define zeroext i16 @t3(i16 zeroext %c, i16 zeroext %k) nounwind ssp {
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entry:
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; 32BIT-LABEL: t3:
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; 32BIT: movw 20(%esp), %ax
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; 32BIT-NOT: movw %ax, %cx
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; 32BIT: leal 2(%eax), %ecx
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; 64BIT-LABEL: t3:
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; 64BIT-NOT: movw %si, %ax
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; 64BIT: leal 2(%rsi), %eax
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%0 = add i16 %k, 2 ; <i16> [#uses=3]
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%1 = icmp eq i16 %k, %c ; <i1> [#uses=1]
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br i1 %1, label %bb, label %bb1
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bb: ; preds = %entry
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tail call void @foo(i16 zeroext %0) nounwind
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ret i16 %0
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bb1: ; preds = %entry
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ret i16 %0
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}
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define zeroext i16 @t4(i16 zeroext %c, i16 zeroext %k) nounwind ssp {
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entry:
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; 32BIT-LABEL: t4:
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; 32BIT: movw 16(%esp), %ax
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; 32BIT: movw 20(%esp), %cx
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; 32BIT-NOT: movw %cx, %dx
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; 32BIT: leal (%ecx,%eax), %edx
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; 64BIT-LABEL: t4:
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; 64BIT-NOT: movw %si, %ax
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; 64BIT: leal (%rsi,%rdi), %eax
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%0 = add i16 %k, %c ; <i16> [#uses=3]
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%1 = icmp eq i16 %k, %c ; <i1> [#uses=1]
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br i1 %1, label %bb, label %bb1
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bb: ; preds = %entry
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tail call void @foo(i16 zeroext %0) nounwind
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ret i16 %0
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bb1: ; preds = %entry
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ret i16 %0
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}
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