34a61e352e
Make CreatePtrDiff() emit the pattern `ptrtoaddr(p1)-ptrtoaddr(p2)`. This makes a few changes: * The return type is now the address type instead of hardcoded to i64. I've adjusted callers to deal with this where they didn't already. * Don't use `ConstantExpr::getSizeOf()` and instead get the actual size from DataLayout. These sizeof expressions will be removed as part of the ptradd migration. * Add a convenience overload without the element type, for the case where you want a pure pointer difference. I also adjusted some OpenMP code to consistently use zext for sizes, as I had issues updating the test coverage otherwise (as we ended up randomly picking zext or sext depending on the exact code path).
27 lines
1004 B
LLVM
27 lines
1004 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; Regression test for PR51200.
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;
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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;
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; This transformation requires the pointer size, as it assumes that size_t is
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; the size of a pointer.
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@percent_s = constant [3 x i8] c"%s\00"
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declare i32 @sprintf(ptr, ptr, ...)
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define i32 @PR51200(ptr %p, ptr %p2) {
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; CHECK-LABEL: define i32 @PR51200
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; CHECK-SAME: (ptr [[P:%.*]], ptr [[P2:%.*]]) {
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; CHECK-NEXT: [[STPCPY:%.*]] = call ptr @stpcpy(ptr [[P]], ptr [[P2]])
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; CHECK-NEXT: [[TMP1:%.*]] = ptrtoaddr ptr [[STPCPY]] to i64
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; CHECK-NEXT: [[TMP2:%.*]] = ptrtoaddr ptr [[P]] to i64
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; CHECK-NEXT: [[TMP3:%.*]] = sub i64 [[TMP1]], [[TMP2]]
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; CHECK-NEXT: [[CALL:%.*]] = trunc i64 [[TMP3]] to i32
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; CHECK-NEXT: ret i32 [[CALL]]
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;
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; Don't check anything, just expect the test to compile successfully.
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%call = call i32 (ptr, ptr, ...) @sprintf(ptr %p, ptr @percent_s, ptr %p2)
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ret i32 %call
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}
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