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TheRock/compiler/amd-llvm/llvm/test/Transforms/Reassociate/multistep.ll
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

37 lines
1.1 KiB
LLVM

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=reassociate -S | FileCheck %s
; Check that a*a*b+a*a*c is turned into a*(a*(b+c)).
define i64 @multistep1(i64 %a, i64 %b, i64 %c) {
; CHECK-LABEL: @multistep1(
; CHECK-NEXT: [[REASS_ADD1:%.*]] = add i64 [[C:%.*]], [[B:%.*]]
; CHECK-NEXT: [[REASS_MUL2:%.*]] = mul i64 [[A:%.*]], [[A]]
; CHECK-NEXT: [[REASS_MUL:%.*]] = mul i64 [[REASS_MUL2]], [[REASS_ADD1]]
; CHECK-NEXT: ret i64 [[REASS_MUL]]
;
%t0 = mul i64 %a, %b
%t1 = mul i64 %a, %t0 ; a*(a*b)
%t2 = mul i64 %a, %c
%t3 = mul i64 %a, %t2 ; a*(a*c)
%t4 = add i64 %t1, %t3
ret i64 %t4
}
; Check that a*b+a*c+d is turned into a*(b+c)+d.
define i64 @multistep2(i64 %a, i64 %b, i64 %c, i64 %d) {
; CHECK-LABEL: @multistep2(
; CHECK-NEXT: [[REASS_ADD:%.*]] = add i64 [[C:%.*]], [[B:%.*]]
; CHECK-NEXT: [[REASS_MUL:%.*]] = mul i64 [[REASS_ADD]], [[A:%.*]]
; CHECK-NEXT: [[T3:%.*]] = add i64 [[REASS_MUL]], [[D:%.*]]
; CHECK-NEXT: ret i64 [[T3]]
;
%t0 = mul i64 %a, %b
%t1 = mul i64 %a, %c
%t2 = add i64 %t1, %d ; a*c+d
%t3 = add i64 %t0, %t2 ; a*b+(a*c+d)
ret i64 %t3
}