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AMDGPU: Fix v2i64/v2f64 bitcasts

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These operations tend to get promoted away to v4i32 so
this doesn't happen often.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@270740 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2016-05-25 18:07:36 +00:00
parent 211d1cd5a3
commit 2997ae6e3e
2 changed files with 35 additions and 1 deletions
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2
lib/Target/AMDGPU/SIInstructions.td
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@ -2873,6 +2873,8 @@ def : BitConvert <v2f64, v4f32, VReg_128>;
def : BitConvert <v2f64, v4i32, VReg_128>;
def : BitConvert <v4f32, v2f64, VReg_128>;
def : BitConvert <v4i32, v2f64, VReg_128>;
def : BitConvert <v2i64, v2f64, VReg_128>;
def : BitConvert <v2f64, v2i64, VReg_128>;
// 256-bit bitcast
def : BitConvert <v8i32, v8f32, SReg_256>;

34
test/CodeGen/AMDGPU/bitcast.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
; This test just checks that the compiler doesn't crash.
@ -75,3 +75,35 @@ define void @bitcast_f64_to_v2i32(<2 x i32> addrspace(1)* %out, double addrspace
store <2 x i32> %bc, <2 x i32> addrspace(1)* %out, align 8
ret void
}
; FUNC-LABEL: {{^}}bitcast_v2i64_to_v2f64:
define void @bitcast_v2i64_to_v2f64(i32 %cond, <2 x double> addrspace(1)* %out, <2 x i64> %value) {
entry:
%cmp0 = icmp eq i32 %cond, 0
br i1 %cmp0, label %if, label %end
if:
%cast = bitcast <2 x i64> %value to <2 x double>
br label %end
end:
%phi = phi <2 x double> [zeroinitializer, %entry], [%cast, %if]
store <2 x double> %phi, <2 x double> addrspace(1)* %out
ret void
}
; FUNC-LABEL: {{^}}bitcast_v2f64_to_v2i64:
define void @bitcast_v2f64_to_v2i64(i32 %cond, <2 x i64> addrspace(1)* %out, <2 x double> %value) {
entry:
%cmp0 = icmp eq i32 %cond, 0
br i1 %cmp0, label %if, label %end
if:
%cast = bitcast <2 x double> %value to <2 x i64>
br label %end
end:
%phi = phi <2 x i64> [zeroinitializer, %entry], [%cast, %if]
store <2 x i64> %phi, <2 x i64> addrspace(1)* %out
ret void
}