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[AArch64] Narrow arguments passed in wrong position on the stack in
big-endian mode. Patch by Asiri Rathnayake. Differential Revision: http://reviews.llvm.org/D4922 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215716 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1779,7 +1779,7 @@ SDValue AArch64TargetLowering::LowerFormalArguments(
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} else { // VA.isRegLoc()
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assert(VA.isMemLoc() && "CCValAssign is neither reg nor mem");
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unsigned ArgOffset = VA.getLocMemOffset();
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unsigned ArgSize = VA.getLocVT().getSizeInBits() / 8;
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unsigned ArgSize = VA.getValVT().getSizeInBits() / 8;
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uint32_t BEAlign = 0;
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if (ArgSize < 8 && !Subtarget->isLittleEndian())
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@ -2321,7 +2321,7 @@ AArch64TargetLowering::LowerCall(CallLoweringInfo &CLI,
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// common case. It should also work for fundamental types too.
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uint32_t BEAlign = 0;
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unsigned OpSize = Flags.isByVal() ? Flags.getByValSize() * 8
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: VA.getLocVT().getSizeInBits();
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: VA.getValVT().getSizeInBits();
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OpSize = (OpSize + 7) / 8;
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if (!Subtarget->isLittleEndian() && !Flags.isByVal()) {
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if (OpSize < 8)
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24
test/CodeGen/AArch64/arm64-aapcs-be.ll
Normal file
24
test/CodeGen/AArch64/arm64-aapcs-be.ll
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@ -0,0 +1,24 @@
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; RUN: llc -mtriple=aarch64_be-none-eabi -fast-isel=false < %s | FileCheck %s
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; RUN: llc -mtriple=aarch64_be-none-eabi -fast-isel=true < %s | FileCheck %s
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; Check narrow argument passing via stack - callee end
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define i32 @test_narrow_args_callee(i64 %x0, i64 %x1, i64 %x2, i64 %x3, i64 %x4, i64 %x5, i64 %x6, i64 %x7, i8 %c, i16 %s) #0 {
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entry:
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%conv = zext i8 %c to i32
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%conv1 = sext i16 %s to i32
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%add = add nsw i32 %conv1, %conv
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; CHECK-LABEL: test_narrow_args_callee:
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; CHECK-DAG: ldrb w{{[0-9]}}, [sp, #7]
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; CHECK-DAG: ldr{{s?}}h w{{[0-9]}}, [sp, #14]
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ret i32 %add
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}
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; Check narrow argument passing via stack - caller end
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define i32 @test_narrow_args_caller() #0 {
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entry:
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%call = tail call i32 @test_narrow_args_callee(i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i8 8, i16 9)
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; CHECK-LABEL: test_narrow_args_caller:
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; CHECK-DAG: strh w{{[0-9]}}, [sp, #14]
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; CHECK-DAG: strb w{{[0-9]}}, [sp, #7]
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ret i32 %call
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}
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