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https://github.com/c64scene-ar/llvm-6502.git
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cbeeae23c3
correct alignment information, which simplifies ExpandRes_VAARG a bit. The patch introduces a new alignment information to TargetLoweringInfo. This is needed since the two natural candidates cannot be used: * The 's' in target data: If this is set to the minimal alignment of any argument, getCallFrameTypeAlignment would return 4 for doubles on ARM for example. * The getTransientStackAlignment method. It is possible for an architecture to have argument less aligned than what we maintain the stack pointer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108072 91177308-0d34-0410-b5e6-96231b3b80d8
42 lines
1.1 KiB
LLVM
42 lines
1.1 KiB
LLVM
; RUN: llc < %s -mtriple=armv7-none-linux-gnueabi | FileCheck %s
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; Test that we correctly align elements when using va_arg
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; CHECK: test1:
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; CHECK-NOT: bfc
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; CHECK: add r0, r0, #7
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; CHECK: bfc r0, #0, #3
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; CHECK-NOT: bfc
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define i64 @test1(i32 %i, ...) nounwind optsize {
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entry:
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%g = alloca i8*, align 4
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%g1 = bitcast i8** %g to i8*
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call void @llvm.va_start(i8* %g1)
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%0 = va_arg i8** %g, i64
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call void @llvm.va_end(i8* %g1)
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ret i64 %0
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}
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; CHECK: test2:
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; CHECK-NOT: bfc
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; CHECK: add r0, r0, #7
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; CHECK: bfc r0, #0, #3
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; CHECK-NOT: bfc
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; CHECK: bx lr
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define double @test2(i32 %a, i32 %b, ...) nounwind optsize {
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entry:
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%ap = alloca i8*, align 4 ; <i8**> [#uses=3]
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%ap1 = bitcast i8** %ap to i8* ; <i8*> [#uses=2]
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call void @llvm.va_start(i8* %ap1)
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%0 = va_arg i8** %ap, i32 ; <i32> [#uses=0]
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%1 = va_arg i8** %ap, double ; <double> [#uses=1]
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call void @llvm.va_end(i8* %ap1)
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ret double %1
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}
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declare void @llvm.va_start(i8*) nounwind
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declare void @llvm.va_end(i8*) nounwind
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