http://llvm.org/bugs/show_bug.cgi?id=15010
Bug #: 15010
Summary: Clang coerces {int,unsigned}
__attribute__((ext_vector_type(2))) to doubles.
Product: clang
Version: trunk
Platform: PC
OS/Version: All
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
Clang compiles the following c file:
-----
typedef int int2 __attribute__((ext_vector_type(2)));
typedef unsigned uint2 __attribute__((ext_vector_type(2)));
int2 test(int2 x, int2 y) {
return x + y;
}
uint2 test2(uint2 x, uint2 y) {
return x + y;
}
-----
to the following IR using 'clang -c test.c -emit-llvm -S -o -':
-----
; ModuleID = 'test.c'
target datalayout =
"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.8.0"
define double @test(double %x.coerce, double %y.coerce) nounwind uwtable ssp {
entry:
%retval = alloca <2 x i32>, align 8
%x = alloca <2 x i32>, align 8
%x.addr = alloca <2 x i32>, align 8
%y = alloca <2 x i32>, align 8
%y.addr = alloca <2 x i32>, align 8
%0 = bitcast <2 x i32>* %x to double*
store double %x.coerce, double* %0, align 1
%x1 = load <2 x i32>* %x, align 8
store <2 x i32> %x1, <2 x i32>* %x.addr, align 8
%1 = bitcast <2 x i32>* %y to double*
store double %y.coerce, double* %1, align 1
%y2 = load <2 x i32>* %y, align 8
store <2 x i32> %y2, <2 x i32>* %y.addr, align 8
%2 = load <2 x i32>* %x.addr, align 8
%3 = load <2 x i32>* %y.addr, align 8
%add = add <2 x i32> %2, %3
store <2 x i32> %add, <2 x i32>* %retval
%4 = bitcast <2 x i32>* %retval to double*
%5 = load double* %4, align 1
ret double %5
}
define double @test2(double %x.coerce, double %y.coerce) nounwind uwtable ssp {
entry:
%retval = alloca <2 x i32>, align 8
%x = alloca <2 x i32>, align 8
%x.addr = alloca <2 x i32>, align 8
%y = alloca <2 x i32>, align 8
%y.addr = alloca <2 x i32>, align 8
%0 = bitcast <2 x i32>* %x to double*
store double %x.coerce, double* %0, align 1
%x1 = load <2 x i32>* %x, align 8
store <2 x i32> %x1, <2 x i32>* %x.addr, align 8
%1 = bitcast <2 x i32>* %y to double*
store double %y.coerce, double* %1, align 1
%y2 = load <2 x i32>* %y, align 8
store <2 x i32> %y2, <2 x i32>* %y.addr, align 8
%2 = load <2 x i32>* %x.addr, align 8
%3 = load <2 x i32>* %y.addr, align 8
%add = add <2 x i32> %2, %3
store <2 x i32> %add, <2 x i32>* %retval
%4 = bitcast <2 x i32>* %retval to double*
%5 = load double* %4, align 1
ret double %5
}
-----
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