99809f98d7
For tracked globals that are unknown after solving, we expect all
non-store uses to be replaced.
This is a follow-up to f8045b250d, which removed forcedconstant.
We should not mark unknown loads as overdefined, as they either load
from an unknown pointer or an undef global. Restore the original logic
for loads.
88 lines
2.8 KiB
LLVM
88 lines
2.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
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; RUN: opt < %s -S -ipsccp | 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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define void @fn2(i32* %P) {
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; CHECK-LABEL: define {{[^@]+}}@fn2
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; CHECK-SAME: (i32* [[P:%.*]])
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[IF_END:%.*]]
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; CHECK: for.cond1:
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; CHECK-NEXT: br i1 false, label [[IF_END]], label [[IF_END]]
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; CHECK: if.end:
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; CHECK-NEXT: [[CALL:%.*]] = call i32 @fn1(i32 undef)
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; CHECK-NEXT: store i32 [[CALL]], i32* [[P]]
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; CHECK-NEXT: br label [[FOR_COND1:%.*]]
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;
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entry:
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br label %if.end
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for.cond1: ; preds = %if.end, %for.end
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br i1 undef, label %if.end, label %if.end
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if.end: ; preds = %lbl, %for.cond1
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%e.2 = phi i32* [ undef, %entry ], [ null, %for.cond1 ], [ null, %for.cond1 ]
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%0 = load i32, i32* %e.2, align 4
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%call = call i32 @fn1(i32 %0)
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store i32 %call, i32* %P
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br label %for.cond1
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}
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define internal i32 @fn1(i32 %p1) {
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; CHECK-LABEL: define {{[^@]+}}@fn1
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; CHECK-SAME: (i32 [[P1:%.*]])
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i32 undef, 0
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; CHECK-NEXT: [[COND:%.*]] = select i1 [[TOBOOL]], i32 undef, i32 undef
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; CHECK-NEXT: ret i32 [[COND]]
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;
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entry:
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%tobool = icmp ne i32 %p1, 0
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%cond = select i1 %tobool, i32 %p1, i32 %p1
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ret i32 %cond
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}
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define void @fn_no_null_opt(i32* %P) #0 {
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; CHECK-LABEL: define {{[^@]+}}@fn_no_null_opt
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; CHECK-SAME: (i32* [[P:%.*]])
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[IF_END:%.*]]
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; CHECK: for.cond1:
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; CHECK-NEXT: br i1 false, label [[IF_END]], label [[IF_END]]
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; CHECK: if.end:
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; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* null, align 4
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; CHECK-NEXT: [[CALL:%.*]] = call i32 @fn0(i32 [[TMP0]])
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; CHECK-NEXT: store i32 [[CALL]], i32* [[P]]
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; CHECK-NEXT: br label [[FOR_COND1:%.*]]
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;
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entry:
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br label %if.end
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for.cond1: ; preds = %if.end, %for.end
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br i1 undef, label %if.end, label %if.end
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if.end: ; preds = %lbl, %for.cond1
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%e.2 = phi i32* [ undef, %entry ], [ null, %for.cond1 ], [ null, %for.cond1 ]
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%0 = load i32, i32* %e.2, align 4
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%call = call i32 @fn0(i32 %0)
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store i32 %call, i32* %P
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br label %for.cond1
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}
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define internal i32 @fn0(i32 %p1) {
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; CHECK-LABEL: define {{[^@]+}}@fn0
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; CHECK-SAME: (i32 [[P1:%.*]])
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i32 [[P1]], 0
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; CHECK-NEXT: [[COND:%.*]] = select i1 [[TOBOOL]], i32 [[P1]], i32 [[P1]]
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; CHECK-NEXT: ret i32 [[COND]]
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;
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entry:
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%tobool = icmp ne i32 %p1, 0
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%cond = select i1 %tobool, i32 %p1, i32 %p1
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ret i32 %cond
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}
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attributes #0 = { "null-pointer-is-valid"="true" }
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