fef62be09c
This patch canonicalizes `extractvalue (select Cond, TV, FV)` into `select Cond, (extractvalue TV), (extractvalue FV)`. The latter form may enable more optimizations.
84 lines
3.4 KiB
LLVM
84 lines
3.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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define i64 @test_select_agg_constant_agg(i64 %val, i1 %cond) {
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; CHECK-LABEL: define i64 @test_select_agg_constant_agg(
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; CHECK-SAME: i64 [[VAL:%.*]], i1 [[COND:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[RET:%.*]] = zext i1 [[COND]] to i64
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; CHECK-NEXT: ret i64 [[RET]]
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;
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entry:
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%sel = select i1 %cond, { i64, i64 } {i64 1, i64 2}, { i64, i64 } {i64 0, i64 3}
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%ret = extractvalue { i64, i64 } %sel, 0
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ret i64 %ret
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}
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define void @test_select_agg_constant_agg_multiuse(i64 %val, i1 %cond) {
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; CHECK-LABEL: define void @test_select_agg_constant_agg_multiuse(
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; CHECK-SAME: i64 [[VAL:%.*]], i1 [[COND:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[RET:%.*]] = zext i1 [[COND]] to i64
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; CHECK-NEXT: call void @use(i64 [[RET]])
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; CHECK-NEXT: [[V1:%.*]] = select i1 [[COND]], i64 2, i64 3
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; CHECK-NEXT: call void @use(i64 [[V1]])
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; CHECK-NEXT: ret void
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;
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entry:
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%sel = select i1 %cond, { i64, i64 } {i64 1, i64 2}, { i64, i64 } {i64 0, i64 3}
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%v0 = extractvalue { i64, i64 } %sel, 0
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call void @use(i64 %v0)
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%v1 = extractvalue { i64, i64 } %sel, 1
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call void @use(i64 %v1)
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ret void
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}
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; TODO: it can be folded to zext i1 %cond to i64
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define i64 @test_select_agg_constant(i64 %val, i1 %cond) {
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; CHECK-LABEL: define i64 @test_select_agg_constant(
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; CHECK-SAME: i64 [[VAL:%.*]], i1 [[COND:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A:%.*]] = insertvalue { i64, i64 } { i64 1, i64 poison }, i64 [[VAL]], 1
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; CHECK-NEXT: [[B:%.*]] = insertvalue { i64, i64 } { i64 0, i64 poison }, i64 [[VAL]], 1
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[COND]], { i64, i64 } [[A]], { i64, i64 } [[B]]
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; CHECK-NEXT: [[RET:%.*]] = extractvalue { i64, i64 } [[SEL]], 0
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; CHECK-NEXT: ret i64 [[RET]]
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;
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entry:
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%a = insertvalue { i64, i64 } { i64 1, i64 poison }, i64 %val, 1
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%b = insertvalue { i64, i64 } { i64 0, i64 poison }, i64 %val, 1
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%sel = select i1 %cond, { i64, i64 } %a, { i64, i64 } %b
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%ret = extractvalue { i64, i64 } %sel, 0
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ret i64 %ret
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}
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define void @test_select_agg_multiuse(i1 %cond, i64 %v1, i64 %v2, i64 %v3, i64 %v4) {
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; CHECK-LABEL: define void @test_select_agg_multiuse(
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; CHECK-SAME: i1 [[COND:%.*]], i64 [[V1:%.*]], i64 [[V2:%.*]], i64 [[V3:%.*]], i64 [[V4:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A0:%.*]] = insertvalue { i64, i64 } poison, i64 [[V1]], 0
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; CHECK-NEXT: [[A1:%.*]] = insertvalue { i64, i64 } [[A0]], i64 [[V2]], 1
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; CHECK-NEXT: [[B0:%.*]] = insertvalue { i64, i64 } poison, i64 [[V3]], 0
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; CHECK-NEXT: [[B1:%.*]] = insertvalue { i64, i64 } [[B0]], i64 [[V4]], 1
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[COND]], { i64, i64 } [[A1]], { i64, i64 } [[B1]]
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; CHECK-NEXT: [[X:%.*]] = extractvalue { i64, i64 } [[SEL]], 0
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; CHECK-NEXT: call void @use(i64 [[X]])
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; CHECK-NEXT: [[Y:%.*]] = extractvalue { i64, i64 } [[SEL]], 1
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; CHECK-NEXT: call void @use(i64 [[Y]])
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; CHECK-NEXT: ret void
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;
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entry:
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%a0 = insertvalue { i64, i64 } poison, i64 %v1, 0
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%a1 = insertvalue { i64, i64 } %a0, i64 %v2, 1
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%b0 = insertvalue { i64, i64 } poison, i64 %v3, 0
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%b1 = insertvalue { i64, i64 } %b0, i64 %v4, 1
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%sel = select i1 %cond, { i64, i64 } %a1, { i64, i64 } %b1
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%x = extractvalue { i64, i64 } %sel, 0
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call void @use(i64 %x)
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%y = extractvalue { i64, i64 } %sel, 1
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call void @use(i64 %y)
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ret void
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}
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declare void @use(i64)
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