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[DAGCombiner] Pre-commit test to demonstrate mulhi const folding 

D103323 will fold this

Differential Revision: https://reviews.llvm.org/D105424

Change-Id: I64947215eb531fbd70b52a72203b39e43fefafcc
This commit is contained in:
David Stuttard 2021-07-05 11:08:03 +01:00
parent ee752134ac
commit 4b125b23ba
1 changed files with 15 additions and 0 deletions
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15
llvm/test/CodeGen/AMDGPU/udiv.ll
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@ -200,3 +200,18 @@ bb:
store i8 %tmp6, i8 addrspace(1)* null, align 1
ret void
}
define i64 @v_test_udiv64_mulhi_fold(i64 %arg) {
; GCN-LABEL: v_test_udiv64_mulhi_fold
; GFX1030: s_mov_b32 [[VAL1:s[0-9]+]], 0xa9000000
; GFX1030: s_brev_b32 [[VAL2:s[0-9]+]], 6
; GFX1030: s_movk_i32 [[VAL3:s[0-9]+]], 0x500
; GFX1030: s_mul_hi_u32 s7, [[VAL1]], [[VAL2]]
; GFX1030: s_mov_b32 [[VAL4:s[0-9]+]], 0xa7c5
; GFX1030: s_mul_hi_u32 s8, [[VAL1]], [[VAL3]]
; GFX1030: s_mul_hi_u32 s5, [[VAL4]], [[VAL2]]
; GFX1030: s_mul_hi_u32 s6, [[VAL4]], [[VAL3]]
; GFX1030: v_add_co_u32 v{{[0-9]+}}, s{{[0-9]+}}, s{{[0-9]+}}, s{{[0-9]+}}
%d = udiv i64 %arg, 100000
ret i64 %d
}