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[NVPTX] Use ABI alignment for parameters when alignment is not specified.

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Affects SM 2.0+.  Fixes bug 13324.

llvm-svn: 167646
This commit is contained in:
Justin Holewinski 2012-11-09 23:50:24 +00:00
parent 3163eb097c
commit be8faeed70
2 changed files with 28 additions and 0 deletions
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3
lib/Target/NVPTX/NVPTXAsmPrinter.cpp
View File

@ -1525,6 +1525,9 @@ void NVPTXAsmPrinter::emitFunctionParamList(const Function *F,
// <a> = PAL.getparamalignment
// size = typeallocsize of element type
unsigned align = PAL.getParamAlignment(paramIndex+1);
if (align == 0)
align = TD->getABITypeAlignment(ETy);
unsigned sz = TD->getTypeAllocSize(ETy);
O << "\t.param .align " << align
<< " .b8 ";

25
test/CodeGen/NVPTX/param-align.ll Normal file
View File

@ -0,0 +1,25 @@
; RUN: llc < %s -march=nvptx -mcpu=sm_20 | FileCheck %s
;;; Need 4-byte alignment on float* passed byval
define ptx_device void @t1(float* byval %x) {
; CHECK: .func t1
; CHECK: .param .align 4 .b8 t1_param_0[4]
ret void
}
;;; Need 8-byte alignment on double* passed byval
define ptx_device void @t2(double* byval %x) {
; CHECK: .func t2
; CHECK: .param .align 8 .b8 t2_param_0[8]
ret void
}
;;; Need 4-byte alignment on float2* passed byval
%struct.float2 = type { float, float }
define ptx_device void @t3(%struct.float2* byval %x) {
; CHECK: .func t3
; CHECK: .param .align 4 .b8 t3_param_0[8]
ret void
}