derek.holloway
7502bf64a4
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63 lines
1.5 KiB
LLVM
63 lines
1.5 KiB
LLVM
; RUN: opt -passes='require<profile-summary>,function(codegenprepare)' -disable-cgp-branch-opts -S < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; The first cast should be sunk into block2, in order that the
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; instruction selector can form an efficient
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; ptr i64 -> i128 multiplication.
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define i128 @sink(ptr %mem1, ptr %mem2) {
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; CHECK-LABEL: block1:
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; CHECK-NEXT: load
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block1:
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%l1 = load i64, ptr %mem1
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%s1 = sext i64 %l1 to i128
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br label %block2
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; CHECK-NEXT: sext
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; CHECK-NEXT: load
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; CHECK-NEXT: sext
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block2:
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%l2 = load i64, ptr %mem2
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%s2 = sext i64 %l2 to i128
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%res = mul i128 %s1, %s2
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ret i128 %res
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}
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; The first cast should be hoisted into block1, in order that the
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; instruction selector can form an extend-load.
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define i64 @hoist(ptr %mem1, ptr %mem2) {
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; CHECK-LABEL: block1:
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; CHECK-NEXT: load
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; CHECK-NEXT: sext
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block1:
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%l1 = load i32, ptr %mem1
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br label %block2
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; CHECK-NEXT: load
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; CHECK-NEXT: sext
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block2:
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%s1 = sext i32 %l1 to i64
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%l2 = load i32, ptr %mem2
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%s2 = sext i32 %l2 to i64
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%res = mul i64 %s1, %s2
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ret i64 %res
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}
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; Make sure the cast sink logic and OptimizeExtUses don't end up in an infinite
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; loop.
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define i128 @use_ext_source(i1 %arg) {
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block1:
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%v1 = or i64 undef, undef
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%v2 = zext i64 %v1 to i128
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br i1 %arg, label %block2, label %block3
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block2:
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%v3 = add i64 %v1, 1
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%v4 = zext i64 %v3 to i128
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br label %block3
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block3:
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%res = phi i128 [ %v2, %block1 ], [ %v4, %block2 ]
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ret i128 %res
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}
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