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90ba1bcb73
Previously the RedoInsts was processed at the end of the block. However it was possible that it left behind some instructions that were not canonicalized. This should guarantee that any previous instruction in the basic block is canonicalized before we process a new instruction. llvm-svn: 258830
32 lines
1.1 KiB
LLVM
32 lines
1.1 KiB
LLVM
; RUN: opt < %s -reassociate -S | FileCheck %s
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; CHECK-LABEL: faddsubAssoc1
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; CHECK: [[TMP1:%.*]] = fsub fast half 0xH8000, %a
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; CHECK: [[TMP2:%.*]] = fadd fast half %b, [[TMP1]]
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; CHECK: fmul fast half [[TMP2]], 0xH4500
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; CHECK: ret
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; Input is A op (B op C)
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define half @faddsubAssoc1(half %a, half %b) {
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%tmp1 = fmul fast half %b, 0xH4200 ; 3*b
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%tmp2 = fmul fast half %a, 0xH4500 ; 5*a
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%tmp3 = fmul fast half %b, 0xH4000 ; 2*b
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%tmp4 = fsub fast half %tmp2, %tmp1 ; 5 * a - 3 * b
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%tmp5 = fsub fast half %tmp3, %tmp4 ; 2 * b - ( 5 * a - 3 * b)
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ret half %tmp5 ; = 5 * (b - a)
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}
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; CHECK-LABEL: faddsubAssoc2
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; CHECK: [[TMP1:%tmp.*]] = fmul fast half %a, 0xH4500
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; CHECK: [[TMP2:%tmp.*]] = fmul fast half %b, 0xH3C00
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; CHECK: fadd fast half [[TMP2]], [[TMP1]]
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; CHECK: ret
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; Input is (A op B) op C
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define half @faddsubAssoc2(half %a, half %b) {
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%tmp1 = fmul fast half %b, 0xH4200 ; 3*b
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%tmp2 = fmul fast half %a, 0xH4500 ; 5*a
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%tmp3 = fmul fast half %b, 0xH4000 ; 2*b
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%tmp4 = fadd fast half %tmp2, %tmp1 ; 5 * a + 3 * b
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%tmp5 = fsub fast half %tmp4, %tmp3 ; (5 * a + 3 * b) - (2 * b)
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ret half %tmp5 ; = 5 * a + b
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}
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