mirror of
https://github.com/c64scene-ar/llvm-6502.git
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7014d274e4
This commit implements the correct lowering of the COPY_STRUCT_BYVAL_I32 pseudo-instruction for thumb1 targets. Previously, the lowering of COPY_STRUCT_BYVAL_I32 generated the post-increment forms of ldr/ldrh/ldrb instructions. Thumb1 does not have the post-increment form of these instructions so the generated assembly contained invalid instructions. Passing the generated assembly to gcc caused it to complain with an error like this: Error: cannot honor width suffix -- `ldrb r3,[r0],#1' and the integrated assembler would generate an object file with an invalid instruction encoding. This commit contains a small test case that demonstrates the problem with thumb1 targets as well as an expanded test case that more throughly tests the lowering of byval struct passing for arm, thumb1, and thumb2 targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192916 91177308-0d34-0410-b5e6-96231b3b80d8
58 lines
2.1 KiB
LLVM
58 lines
2.1 KiB
LLVM
; RUN: llc -mtriple thumbv5-none-linux-gnueabi < %s | FileCheck %s
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%struct.C = type { [1000 x i8] }
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%struct.S = type { [1000 x i16] }
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%struct.I = type { [1000 x i32] }
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;CHECK-LABEL: pass_C:
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;CHECK-NOT: ldrb r{{[0-9]+}}, [{{.*}}], #1
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;CHECK-NOT: strb r{{[0-9]+}}, [{{.*}}], #1
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define void @pass_C() #0 {
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entry:
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%c = alloca %struct.C, align 1
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%0 = getelementptr inbounds %struct.C* %c, i32 0, i32 0, i32 0
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call void @llvm.lifetime.start(i64 1000, i8* %0) #1
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call void @use_C(%struct.C* byval %c) #3
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call void @llvm.lifetime.end(i64 1000, i8* %0) #1
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ret void
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}
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;CHECK-LABEL: pass_S:
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;CHECK-NOT: ldrh r{{[0-9]+}}, [{{.*}}], #2
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;CHECK-NOT: strh r{{[0-9]+}}, [{{.*}}], #2
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define void @pass_S() #0 {
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entry:
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%s = alloca %struct.S, align 2
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%0 = bitcast %struct.S* %s to i8*
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call void @llvm.lifetime.start(i64 2000, i8* %0) #1
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call void @use_S(%struct.S* byval %s) #3
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call void @llvm.lifetime.end(i64 2000, i8* %0) #1
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ret void
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}
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;CHECK-LABEL: pass_I:
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;CHECK-NOT: ldr r{{[0-9]+}}, [{{.*}}], #4
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;CHECK-NOT: str r{{[0-9]+}}, [{{.*}}], #4
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define void @pass_I() #0 {
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entry:
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%i = alloca %struct.I, align 4
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%0 = bitcast %struct.I* %i to i8*
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call void @llvm.lifetime.start(i64 4000, i8* %0) #1
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call void @use_I(%struct.I* byval %i) #3
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call void @llvm.lifetime.end(i64 4000, i8* %0) #1
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ret void
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}
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declare void @use_C(%struct.C* byval) #2
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declare void @use_S(%struct.S* byval) #2
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declare void @use_I(%struct.I* byval) #2
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declare void @llvm.lifetime.start(i64, i8* nocapture) #1
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declare void @llvm.lifetime.end(i64, i8* nocapture) #1
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attributes #0 = { nounwind optsize "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind }
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attributes #2 = { optsize "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #3 = { nounwind optsize }
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