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R600/SI: Add pattern for truncating i32 to i1

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Fixes half a dozen piglit tests with radeonsi.

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200283 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michel Danzer 2014-01-28 03:01:16 +00:00
parent 8322c0f305
commit f555fb410e
2 changed files with 15 additions and 0 deletions
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5
lib/Target/R600/SIInstructions.td
View File

@ -2126,6 +2126,11 @@ def : Pat <
(EXTRACT_SUBREG $a, sub0)
>;
def : Pat <
(i1 (trunc i32:$a)),
(V_CMP_EQ_I32_e64 (V_AND_B32_e32 (i32 1), $a), 1)
>;
// V_ADD_I32_e32/S_ADD_I32 produces carry in VCC/SCC. For the vector
// case, the sgpr-copies pass will fix this to use the vector version.
def : Pat <

10
test/CodeGen/R600/trunc.ll
View File

@ -28,3 +28,13 @@ define void @trunc_shl_i64(i32 addrspace(1)* %out, i64 %a) {
store i32 %result, i32 addrspace(1)* %out, align 4
ret void
}
; SI-LABEL: @trunc_i32_to_i1:
; SI: V_AND_B32
; SI: V_CMP_EQ_I32
define void @trunc_i32_to_i1(i32 addrspace(1)* %out, i32 %a) {
%trunc = trunc i32 %a to i1
%result = select i1 %trunc, i32 1, i32 0
store i32 %result, i32 addrspace(1)* %out, align 4
ret void
}