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[DebugInfo] Restore test case for long double constants. 

Summary:
D27549 (partial fix for PR26619) emits a constant value in the debug
metadata for a floating-point static const that does not exceed 64
bits in size.  Whether or not a long double exceeds 64 bits in size
depends on the target.  Modify the test case so that it expects a
constant value for long double if and only if the long double is no
larger than 64 bits.

Reviewers: cfe-commits, probinson

Differential Revision: https://reviews.llvm.org/D27597

llvm-svn: 289686
This commit is contained in:
David Gross 2016-12-14 18:52:33 +00:00
parent 78c17385cb
commit ff06759ffb
1 changed files with 23 additions and 8 deletions
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31
clang/test/CodeGen/debug-info-static-const-fp.c
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@ -1,7 +1,25 @@
// RUN: %clang -emit-llvm -O0 -S -g %s -o - | FileCheck %s
// RUN: %clang_cc1 -emit-llvm -O0 -debug-info-kind=limited %s -o - | \
// RUN: FileCheck --check-prefixes CHECK %s
// RUN: %clang_cc1 -triple hexagon-unknown--elf -emit-llvm -O0 -debug-info-kind=limited %s -o - | \
// RUN: FileCheck --check-prefixes CHECK,CHECK-LDsm %s
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -O0 -debug-info-kind=limited %s -o - | \
// RUN: FileCheck --check-prefixes CHECK,CHECK-LDlg %s
// Per PR26619, check that for referenced static const of floating-point type,
// we emit its constant value in debug info. NOTE that PR26619 is not yet fixed for long double.
// we emit its constant value in debug info.
//
// NOTE that __fp16 is assumed to be 16 bits, float is assumed to be
// 32 bits, and double is assumed to be 64 bits. Size of long double
// is not known (for example, it is 64 bits for hexagon-unknown--elf,
// but 128 bits for x86_64-unknown-linux-gnu). Therefore, we specify
// target triples where it has a known size, and check accordingly:
// for the absence of a constant (CHECK-LDlg) when the size exceeds 64
// bits, and for the presence of a constant (CHECK-LDsm) but not its
// value when the size does not exceed 64 bits.
//
// NOTE that PR26619 is not yet fixed for types greater than 64 bits.
static const __fp16 hVal = 29/13.0f; // 2.2307692307692307692 (2.23046875)
@ -9,7 +27,7 @@ static const float fVal = -147/17.0f; // -8.6470588235294117647
static const double dVal = 19637/7.0; // 2805.2857142857142857 (2805.2857142857142)
static const long double ldVal = 3/1234567.0L; // 2.4300017739012949479e-06 (<optimized out>)
static const long double ldVal = 3/1234567.0L; // 2.4300017739012949479e-06 (<depends on size of long double>)
int main() {
return hVal + fVal + dVal + ldVal;
@ -24,8 +42,5 @@ int main() {
// CHECK: !DIGlobalVariable(name: "dVal", {{.*}}, isLocal: true, isDefinition: true, expr: ![[DEXPR:[0-9]+]]
// CHECK: ![[DEXPR]] = !DIExpression(DW_OP_constu, 4658387303597904457, DW_OP_stack_value)
// Temporarily removing this check -- for some targets (such as
// "--target=hexagon-unknown-elf"), long double does not exceed 64
// bits, and so we actually do get the constant value (expr) emitted.
//
// DO-NOT-CHECK: !DIGlobalVariable(name: "ldVal", {{.*}}, isLocal: true, isDefinition: true)
// CHECK-LDlg: !DIGlobalVariable(name: "ldVal", {{.*}}, isLocal: true, isDefinition: true)
// CHECK-LDsm: !DIGlobalVariable(name: "ldVal", {{.*}}, isLocal: true, isDefinition: true, expr: