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[PULL,32/33] target/arm/m_helper: Silence GCC 10 maybe-uninitialized error

Message ID 20210119151104.16264-33-peter.maydell@linaro.org (mailing list archive)
State New, archived
Headers show
Series [PULL,01/33] target/arm: Implement an IMPDEF pauth algorithm | expand

Commit Message

Peter Maydell Jan. 19, 2021, 3:11 p.m. UTC
From: Philippe Mathieu-Daudé <f4bug@amsat.org>

When building with GCC 10.2 configured with --extra-cflags=-Os, we get:

  target/arm/m_helper.c: In function ‘arm_v7m_cpu_do_interrupt’:
  target/arm/m_helper.c:1811:16: error: ‘restore_s16_s31’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
   1811 |             if (restore_s16_s31) {
        |                ^
  target/arm/m_helper.c:1350:10: note: ‘restore_s16_s31’ was declared here
   1350 |     bool restore_s16_s31;
        |          ^~~~~~~~~~~~~~~
  cc1: all warnings being treated as errors

Initialize the 'restore_s16_s31' variable to silence the warning.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20210119062739.589049-1-f4bug@amsat.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 target/arm/m_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/target/arm/m_helper.c b/target/arm/m_helper.c
index 61760030292..731c435c00b 100644
--- a/target/arm/m_helper.c
+++ b/target/arm/m_helper.c
@@ -1347,7 +1347,7 @@  static void do_v7m_exception_exit(ARMCPU *cpu)
     bool exc_secure = false;
     bool return_to_secure;
     bool ftype;
-    bool restore_s16_s31;
+    bool restore_s16_s31 = false;
      * If we're not in Handler mode then jumps to magic exception-exit